ce4c83ff
 wxy
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/**
* `confirm` type prompt
*/
var _ = require('lodash');
var util = require('util');
var chalk = require('chalk');
var Base = require('./base');
var observe = require('../utils/events');
/**
* Module exports
*/
module.exports = Prompt;
/**
* Constructor
*/
function Prompt() {
Base.apply(this, arguments);
var rawDefault = true;
_.extend(this.opt, {
filter: function (input) {
var value = rawDefault;
if (input != null && input !== '') {
value = /^y(es)?/i.test(input);
}
return value;
}
});
if (_.isBoolean(this.opt.default)) {
rawDefault = this.opt.default;
}
this.opt.default = rawDefault ? 'Y/n' : 'y/N';
return this;
}
util.inherits(Prompt, Base);
/**
* Start the Inquiry session
* @param {Function} cb Callback when prompt is done
* @return {this}
*/
Prompt.prototype._run = function (cb) {
this.done = cb;
// Once user confirm (enter key)
var events = observe(this.rl);
events.keypress.takeUntil(events.line).forEach(this.onKeypress.bind(this));
events.line.take(1).forEach(this.onEnd.bind(this));
// Init
this.render();
return this;
};
/**
* Render the prompt to screen
* @return {Prompt} self
*/
Prompt.prototype.render = function (answer) {
var message = this.getQuestion();
if (typeof answer === 'boolean') {
message += chalk.cyan(answer ? 'Yes' : 'No');
} else {
message += this.rl.line;
}
this.screen.render(message);
return this;
};
/**
* When user press `enter` key
*/
Prompt.prototype.onEnd = function (input) {
this.status = 'answered';
var output = this.opt.filter(input);
this.render(output);
this.screen.done();
this.done(output);
};
/**
* When user press a key
*/
Prompt.prototype.onKeypress = function () {
this.render();
};
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